Feed-works for wood-working machines



(No Model.) 3 Sheets-Sheet 1.

B. BENJAMIN. FEED WQRKSFOR WOOD WORKING MACHINES. V No. 412,451.Patented Oct. 8, 1889.

3y $7M? M (No M odelJ '3 Sheets Shet 2L E BENJAMIN I FEED WORKS FOR WOODWORKING MACHINES. No. 412,451. Patented Oct. 8, 1889.

(No Model.) I 3 Sheets-Sheet 3,

E. BENJAMIN.

FBEDWORKS FOR WOOD WORKING MAGHINES.

Patented Oct. 8,1889.

mu 5 R v ImW/Imumm N. PETERS, Phowuma n hw. Wash nnnnnn C.

i UNITED. STATES PATENT OFFICE.

' :EDWIN BENJAMIN, SOUTH EVANSTON, ILLINOIS, ASSIGNOR TO TH BENJAMINMACHINE COMPANY, OF ILLINOIS. v v I FEED-WORKS FOR OOD-WORKING MACHINES.

SPECIFICATION forming part of Letters Patent No; 412,451, dated October8,1889. Application filed December 10, 1888. Serial No. 293,127. (Nomodel.)

To all'whom it may concern:

Be it known that I, EDWIN BENJAMIN, of South Evanston, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Feed-Works for VVoodNVorking Machines, of which thefollowing is a specification.

My invention relates particularly to the feed-works of planers havingstationary beds, in which class of planers the lumber is fed byrevolving rollers above and below.

The drawings, which form a part of this specification, and thedescription following herein show and describe the devices for hangingthe upper feed-rolls, which are of the sort known as broken or divided,the gearing for driving the rolls, and also the framing or housing inwhich theyare suspended and through which they are adjusted to Workvarying thicknesses of lumber. The last only is herein made, however,the subjectmatter of claims, such pat-entable subjectmatter as may existin the hanging of the divided upper rolls and the driving-gearing beingmade the subject of two divisional appli cations filed in the PatentOfiice July 22, 1889, and serially numbered 318,266-and 318,267.

In the accompanying drawings, Figure 1 is a side view of the part of thebed on which the gearing is mounted. Fig. 2 is a longitudinal section ofFig. 1. Fig. 3 is a section showing the connection of the adjustingscrews to the frame-work carrying the upper feed-rolls. Fig. 4.shows the rolls as seen from the end of the machine, parts of theframework being shown in section. Fig. 5 is a perspective view of thecross-piece forming a part of the housing of the upper rolls. Fig. 6 isa section of one ofthe rolls.

The lower or fixed rolls 2 2 (wide Fig. 2) run in boxes fitted into thebed. Set-screws 3 3, &c., abut against the bottom of said boxes and maybe used to adjust the height of the rolls with relation to the table.Upon the shafts of said rolls and inside the planer-bed are gears 41 4:.(Shown in dotted outline in Fig. 2.) Said gears mesh with the middlegear 5, whichis rigidly secured to the shaft 6, the latter extendingacross the machine and projecting on each side. The upper rolls hereinrepresented are of the variety known as divided or brokent11at is, twoshort rolls having a common axial line are employed and operated inconjunction with each lower 'roll, as seen in Fig. 4:. The upper rollsare carried in a frame-work consisting of side pieces 7 7, fitted to thestandards 8, and crossbraces 9 9, extending from one side piece to theother. The said frame-work is capable of sliding freely on thestandards, and is supported and adjusted by the screws 10 10, working inthe threaded hubs of the gears 12 12. Said gears are operatedsimultaneously by the worms 13 1.3 on the shaft 1 1. (Vida Fig. 4.) Theworm-gears 12 12 are supported by a cross-piece 11, which rests looselyon the tops of the standards 8, the weights 15 (Male Fig. 2) tending tokeep it down through the connections comprising pressure-bar 16 andbolts or tie-rods 17.

The device connecting the side pieces 7 with the screws 10, as shown inthe detail section, Fig. 3, consists of a collar 18, firmly secured tothe screw which fits between lugs 19 19 on the side pieces 7.

In the construction just described the framework carrying the top'rolls,consisting of side pieces 7 and braces 9, is rigidly connected to thecross-piece 11, its distance therefrom, and hence its elevation, beingadjustable by the elevating-screw 10 and gear 12. The pressure-bar beingconnected independently of the framework for the rolls to thecross-piece 11, the height of the frame-work is adjusted withoutdisturbing the pressurebar.

The broken rolls 20 20 are carried by the frame-work housing beforedescribed, composed of the side pieces 7 7 and cross-braces 9 9, theouter ends of the rolls revolving in 0 boxes in the side pieces 7 andtheir inner ends being carried by hangers 21. (Shown partly in dottedand partly in full lines in Fig. 4..) Said hangers are steadied andguided by a, recess in the crossbrace 9, as shown, 5

bolts 22 limiting their downward motion and a spring above each hangerand surrounding the bolt exerting a yielding pressure on the hanger andits roll. Thus each top roll is capable of yielding independently to alimited extent. If such yielding is not suificient to allow the passageof the lumber, or if the top rollsare not made to yield independently,the whole frame-work yields, as shown in dotted lines in Fig. 2, theweight 15 rising to permit such yielding.

It is evident that whether two widths of narrow lumber or a single pieceof Wide lumber is being planed, and Whether single or broken rolls areused, but especially in the last case, irregularities in the lumber willoften cause one end of the rolls to be lifted more than the other. To soarrange the gearing for driving the top rolls that it shall work easilyand freely under such conditions is one of the purposes of my invention.The gearing for driving the top rolls on one side is shown in Fig. 2.The gear 23 meshes with the gear& of the right-hand roll 2'. A similargear on the same shaft as gear 23 (see 242, Fig. 4) meshes With-gear25,and the last named in turn with gear 26 on the shaft of roll 20. Links27 and 28 (-m' de Figs. 2 and 4) keepgcar in proper mesh with gears 24and 26,. respectively. The roll 20 at the left of Fig. 2 is driven in asimilar manner by I gears on shaft 6 through gears 29 and 30. The rollson theother side of themachine are driven by the gearing shown inFig. 1. A gear 31 on shaft 6 drives the gears 33 on the roll-sh aftthrough the gears 32, the last-named gears being connected to the gears31' and 33 by the links 34 34 and 35 35. (Compare Figs; 1 and 4.) Itwill be seen that in this arrangement of gearing for driving the'toprolls the gears meshing with those on' the rollshafts are directly, ornearly so, under the latter, so that the movement of the rolls inyielding to inequalities in the lumber does 7 the gear 29 only.

not cause the teeth of the gears to bind. Power is communicated to thetrain of gearing by a gear connected to anyone of the system, as shownin Fig. 2. The large gear 39 upon the axis of the left-hand roll 2 isthe main driving-gear. In order not to bring said gear 39 and thosecommunicating power to it too far out from the planer, I have adoptedthe arrangement of gearing shown in Fig. 2 for that side of the machine,while using the simpler form shown in Fig. 1 for the other side; foritmay be seen by a reference to Fig. 4 thatthe gear 39 would need to beplaced considerably farther out to clear the links 34 than to clear(Vida Fig. 2.)

1. The combination, in aWood-workingmw chine, of a movable frameworkcarrying the top rolls, an elevating-screw partaking of the upward anddownward movement of said frame-work, a worm-gear fitted on said screw,and a cross-piece resting loosely upon the stand or fixed portion oi theframe-wormsaid crosspiecesnpporting the said'worm-gear and connected tothe pressure-bar;

2. Theoom'bination,-in-a wood-working ma chine, of standards attached tothe bed, a cross-piece', as 1'1,-resting loosely'npon said standard andconnected to the pressure-bar, aframe-work adapted to slide upon 'saidstandards, feed-rolls carried in said frame work,

nect'ing said frame rigidly but adjustably'with said clross-piece,-substantially as described.

7 I N BENJAMIN. Witnesses:

J. I. VEEDER,

RH. T. MAsoN.

and devices, as screw 10. and gear 12, for con? i r

